742127121 has 12 divisors (see below), whose sum is σ = 1072378320. Its totient is φ = 494559000.

The previous prime is 742127119. The next prime is 742127149. The reversal of 742127121 is 121721247.

It is a happy number.

It is not a de Polignac number, because 742127121 - 2¹ = 742127119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (742127021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10746 + ... + 39996.

It is an arithmetic number, because the mean of its divisors is an integer number (89364860).

Almost surely, 2^742127121 is an apocalyptic number.

It is an amenable number.

742127121 is a deficient number, since it is larger than the sum of its proper divisors (330251199).

742127121 is a wasteful number, since it uses less digits than its factorization.

742127121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32076 (or 32073 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 742127121 is about 27242.0102231829. The cubic root of 742127121 is about 905.3700026497.

Adding to 742127121 its reverse (121721247), we get a palindrome (863848368).

The spelling of 742127121 in words is "seven hundred forty-two million, one hundred twenty-seven thousand, one hundred twenty-one".